StarTech.com Dual Port PCI Express Gigabit Ethernet NIC Network Adapter Card (ST1000SPEXD3) Protect critical networked systems with a redundant and independent Gigabit port Optimize network traffic with support for advanced features such as Jumbo Frames and VLAN tagging Maximize your virtualized server's networking efficiency with dedicated ports Two 10/100/1000Mbps compatible RJ-45 Ethernet ports Jumbo Frame support up to 9k bytes Compatible with PCI Express Base Specification 2.0 (backward compatible with 1.0a/1.1) Realtek RTL8111 Rev. E chipset provides improved compatibility with Intel Series 6 chips Fully Compliant with IEEE 802.3, IEEE 802.3u, IEEE 802.3ab, and supports IEEE 802.1Q VLAN tagging, IEEE 802.1P Layer 2 Priority Encoding and IEEE 802.3x Full Duplex Flow Control